Ryza Rust vs Naples Yellow Deep

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. Naples Yellow Deep is a little lighter, more saturated than Ryza Rust.

Can I use Naples Yellow Deep instead of Ryza Rust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Naples Yellow Deep is a little lighter, more saturated than Ryza Rust.

Can I use Ryza Rust instead of Naples Yellow Deep?

The same difference applies the other way round: Ryza Rust is a little darker, more muted.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.